Dashboard / CVE-2026-115389

CVE-2026-115389

LOW
INFO Priority: 0.00 BB Relevance: 17/100
Published: 2026-10-22 Modified: 2026-10-29 First seen: 2026-10-29 Status: active

Attack Surface

Adjacent

CVSS Vector Breakdown

AV: Adjacent
AC: High
PR: Low
UI: Passive
S: X
AT: Present
VC: None
VI: None
VA: Low

Description

Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 does not adequately account for host allocations when lifting guest values through the dynamically-typed Val API, bypassing the hostcall fuel limit. A malicious WebAssembly guest can return crafted values that allocate at least ~100x more host memory than tracked, causing denial of service.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
bytecodealliance wasmtime 0 < 36.0.16

References & Advisories (2)

Bug Bounty Relevance

17 / 100

CVSS Score

1.0 / 10.0 v4.0
CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.15%
Raw Score 0.001530
Percentile 4.4%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00153
2026-10-28
0.00153

Intelligence Sources

mitre ref →
nvd ref →

External Links